DRIVING RENEWABLE ENERGY VIA HIGH RELIABILITY, LOW WEIGHT,

MULTI PLANET, FLEXIBLE PIN, EPICYCLIC GEARBOXES.

3,6MW GEARBOX FOR OFFSHORE WINDTURBINES DRIVEN BY TECHNOLOGY

variable ratio gearboxin operation in WikovWind turbine in Czech Republic

working in China supporting Licensee Hangzhou Advance Gearbox Group Co

integrating a 3.6MW with the end customer in China

testing in Korea with a Korean and Czech built 3MW gearbox

2MW variable ratio gearbox ready for dispatch.

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1 2 3 4 5 6 7 8

Rela

tive

Root

Str

ess

Inte

nsity

Gauge position

25% Load50% Load75% Load100% Load

Input (rotor) side (left) Output (alternator) side (right)

TYPICAL FACE LOAD DISTRIBUTION

Typical strain gauge output from gear tooth root

MINI-MASS Flexible Pin Gearboxes for wind turbines

• low mass high - reliability wind turbine drive trains with :-• Flexible pins, dual rate stiffness

• Uniform tooth / planet load - multi planet

• Torque split - single plane of reaction - gear train

• Gear case free from rotor loads and defl ections

• Allows gearbox ratio to be continuously

varied throughout whole wind turbine

speed range making it possible use a

direct online synchronous generator

• Synchronous generators give better-

power quality, can operate at higher

voltage and improve the reliability of

the total drive train

• A signifi cant reduction in the offshore

power electronics and electrical equip-

ment increasing the reliability and avai-

lability

• Provides torque protection of the gear

train and rotating elements against wind

gusts resulting in higher gearbox reliability.

• Following the success of the 2MW

variable ratio gearbox ORBITAL2 have

started the development of a 5MW version

DRIVING DIRECT ONLINE SYNCHRONOUS GENERATORS WITH ORBITAL2 VARIABLE RATIO GEARBOXES

Annulus

Planet spindle

Flexible pin

Planet wheel

Carrier

Over load stop

Sun wheel

Hicks designed wind turbine gearboxes

1986 LS1 First European 3MW wind turbine with a fl exible pin gearboxUK WIND ENERGY GROUP

1990’s 350 kW production wind turbine gearboxes UK WIND ENERGY GROUP

2002 World’s fi rst production variable ratio wind turbine 650kWNew Zealand WINDFLOW

2004 3.4 MW variable ratio prototype wind turbineNorway SCANWIND

O R B I T A L 2 licensed gearboxes

Licence to Wikov 2006 1.3 MW the world’s fi rst production tidal turbine UK MARINE CURRENT TURBINES2007 2 MW variable ratio prototype wind turbine Czech Republic WIKOV WIND2008 500 kW tidal turbine prototype UK TGL 2008 3 MW off shore wind turbine production gearboxes Korea DOOSAN2009 3 MW off shore wind turbine production

gearboxes. China SINOVEL 2010 3.6 MW Wind Turbine. China SEWIND 2010 2 MW Wind Turbine Customers: India INOX Korea HYUNDAI China (XJ)2011 5 MW Wind Turbine – China DONGFANG

Licence to DOOSAN Mottrol2010 3 MW Wind Turbine Customers: Doosan Korea

Licence to Hangzhou Advance Gearbox Group Co., Ltd. 2010 2 MW Wind Turbine Customers: China XJ

Licence to China CNR 2010 1.5 MW Wind Turbine Customers: China JINAN

GEARBOX LOAD TESTING

3 MW SINOVEL

2 MW XJ, China

3 MW Doosan

3.6 MW SEWIND

DRIVING RENEWABLE ENERGY VIA HIGH RELIABILITY, LOW WEIGHT, MULTI PLANET, FLEXIBLE PIN, EPICYCLIC GEARBOXES.

, Wikov supplied 3,6MW Gearbox for Shanghai China – one of the largest offshore turbines in China

2MW - built under licence in Czech Republic and China

, Wikov supplied 3 MW Gearbox

new 5MW 1.5MW - supplied by China CNR

2MW assembly in China by Licensee Hangzhou Advance Gearbox Group Co

site visit to 1.5MW Licensee China CNR

site visit to Marine Current Turbines

at the launch of our 1.5MW with Licensee China CNR

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Frank Cunliffe Managing DirectorE-mail: frankcunliffe@orbital2.combiTel.: +44 7768820152

ORBITAL2 ltd.Morva, Griggs CloseChipping CampdenGL55 6BJ, UK www.orbital2.comww